Surface light source device and liquid crystal display device

A surface light source device for emitting planar light, comprising:

• a first light source for emitting first light;
• a first light guide rod having an incident surface, causing said first light to be incident from the incident surface and converting said first light into first linear light;
• a second light source for emitting second light having a greater divergence angle than said first light;
• a second light guide rod having an incident surface, causing said second light to be incident from the incident surface and converting said second light into second linear light extended in the same direction as said first linear light;
• a reflecting bar disposed on an emitting side of said planar light from said first light guide rod and said second light guide rod;
• and
• a reflecting portion taking such a box shape as to accommodate said first light guide rod, said second light source, said light guide rod and said reflecting bar and to have an internal wall serving as a reflecting surface for reflecting said first linear light and said second linear light, and having an opening portion on a surface at the emitting side of said planar light,
• wherein said first linear light and said second linear light are reflected by said reflecting bar and said reflecting surface and are emitted from said opening portion to an outside of said reflecting portion.